Sakupen Hell

Not to be confused with Sakupen Hell from Geometry Dash. Sakupen Hell is an "impossible level" made by Alex343xd. It has gotten a lot of previews and its main goal was to be crowned the hardest RSR level, as the current one was To catch a dream V4, sitting at 11 stars.

Gameplay
Sakupen Hell mainly features Diagonal tiles with objects, 1x3/4/5 swipes, and incredibly fast slide platform swipes.

Themes
Sakupen Hell is interesting Theme-Wise. It seems to change to the CITS and Monody themes sometimes before quickly changing back to the Volcano theme, which is it's main one. It also features a lot of Collapsing CITS towers.

In the making
During development, a lot of the level has been previewed, making the level well known. Among these previews, there is one odd-one-out, that is very glitchy, and is also joined by the following image.

Trivia

 * Even though it's extremely hard, someone rated the level as a 9 star, which became a short lived official rating
 * In the previously mentioned glithcy preview, an image of a Monody theme image can be seen
 * A poll was held where he questioned if Sakupen Hell will have a bonus, but it currently has 1 yes vote
 * Sakupen Hell successfully dethroned To Catch a Dream V4 in terms of difficulty, but it's star rating is still unclear, so Alex says that you should interpret it as basically impossible